The HD 3870 is a dual slot card, PCIE 2.0, with 1024MB of DDR3 memory and an overclocked speed of 825 MHz. The memory speed is 900 MHz. As with the original HD 3870, the 1 gigabyte version is designed with 320 stream processors and plug-and-play ATI CrossFireX upgradeability with up to quad-GPU support.

The Radeon HD 3870 will blow users away with life-like graphics from the latest Microsoft DirectX 10.1 games and stunning 3D graphics and shading effects. Experience the best of Windows Vista and bump up the performance of the Windows Aero graphical interface.

Uncompromising HD video is delivered via ATI Avivo display technology. The latest Blu-ray and HD DVD movies play smoothly at full 1080p with a dedicated hardware video decoder that leaves the CPU unbound to do other tasks. Enjoy digital content with HDMI and built in 5.1 surround sound.

All Diamond video cards carry the Diamond guarantee of quality assurance. Unlike many cards that are simply first to market, Diamond carefully tests and retests every new model for its ratio of performance to reliability. Diamond is legendary in the PC video card business for its less than 1 percent return rate versus an industry average of approximately 10 percent. Diamond cards use superior connectors, cables and components, as well as undergo more thorough testing for heat susceptibility and durability.

Appearently not as the HD3870x2 uses GDDR3 also. I think at this point, the only thing that matters is the core clock speed. If it is 775MHz or higher by default it is a 3870, if it is lower it is a 3850. ATi's naming scheme has become extremely confusing.

I don't understand why it isn't called a HD3850 1gb? It's GDDR3 after all.

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there are a handful of 3870 that use gddr3 but not many....
these clocks are not very high to be called an oc version but i guess its not bad for gddr3
i wanna see how it performs against a 3870 with high clocked gddr4